Can I charge a car battery with a computer power supply?

YES, you can use 12V DC power supply for charging car battery. After charging for 18 hours, check battery voltage. If it is 11.5V or more, start engine (car) with it and keep it charging for at least 30 min.

Can I charge car battery with 20v charger?

Yes, you can. But before that, you need to reduce the voltage to 13.5v and the current drawn from it is 3.4A(may vary from charger to charger). the current also not more than 1.5 A. with these specifications you can design one circuit and you can charge the battery.

Can I charge my car battery with a 12 volt charger?

Although car chargers are known as “12V Car Charger”, they in fact output more than 12V – typically 13.8V or higher and may contain electronics to regulate charge current depending on the battery’s terminal voltage, so if the charger you intend to use outputs regulated 12V, then no, it won’t charge a car battery.

Can I use a 12V battery charger on a car battery?

Your 12v adapter would only be able to raise the battery voltage to 12v, but to charge a car battery fully you would need to raise the voltage to 13.8v. The 16v adapter would raise the voltage too high and could cause damage.

Can I use a charger as a power supply?

— the charger is going to be holding a voltage, and the charging circuit will be hidden close to the battery, inside the device itself. These chargers often can be used as power supplies (remember to not exceed the rating printed on the charger!).

Can you charge an 18 volt battery with a 12 volt charger?

Theoretically, you can charge your car battery with a 12V power supply. For a car battery to be good enough for use, it will need to read at least 13.8V. So if you are charging it with a 12V power supply, you can only get as much as 12V in the battery. It won’t charge it higher than 12V.

Can I use 18V battery for a 12V car?

Batteries between 12v – 18v should work just fine.

How many volts should I charge my laptop battery with?

The method you have used is damaging to battery, laptop charger and Dangerous ! no more than 14.5 volts should be applied across 6 cell lead acid battery, and you are using a 19 plus volts high current source to charge !

Will a laptop charger revive a dead battery?

The battery eventually packed up in end June because cell no.4 went totally dead, but this effort of reviving a battery from dead using a laptop charger worked quite well. The only “consumable” was the bulb, which went kaput after this marathon operation. I repeated this on a weak 65Ah battery and it worked very well.

What is the positive and negative side of a laptop charger?

The inner pin of the laptop charger is the positive and the outer metal covering is the negative. Since the rated amps of the charger is 3.42A, I didn’t want to just connect some cables and end up blowing the charger due to high current, hence used a current limiter in the form of a 21W bulb. 1.

Is it safe to use the DC Jack from the laptop charger?

Step 2: Wiring! To Be More Safe I Crimped Off The DC jack From The Laptop Charger Though You Can Still Use The Dc Jack As It Is,The Outer Metal surface is negative whereas the Small Hole Inside The Dc Jack Is Positive!